Some types of primers are tacky/sticky. These may not slide well through the slots in the Primer Pro Disk or down the Exit Ramp. This can lead to a slow output rates and/or poor exit ramp/hole performance.
One simple solution to this issue is to apply a little silicon to the primers before loading them into the Primer Pro, as shown here
Another effective solution is to periodically clean/lube the Primer Pro plastic parts using a plastic cleaner/Polish or dry lube, such as Pledge, Cockpit spray cleaner or the likes. As shown here.
With one or the other solution applied, all types of Small Primers can successfully be used.
The Primer-Pro is available for small primers only!